package acm.蓝桥杯二分前缀;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.Arrays;
import java.util.StringTokenizer;

public class 轻重分配2 {

    public static void main(String[] args) {
        Reader sc = new Reader();
        int n = sc.nextInt();
        int[] nums = new int[n];
        for (int i = 0; i < nums.length; i++) {
            nums[i]=sc.nextInt();
        }
        System.out.println(fun(nums));
    }
    public static int fun(int []nums){
        Arrays.sort(nums);
        int i = 0, j =nums.length/2;
        int len=j;
        int count=0;
        while (i<len&&j<nums.length){
            while (nums[i]*2>nums[j]){
                j++;
                if (j==nums.length){
                    count--;
                    break;
                }
            }
            count++;
            i++;
            j++;
        }
        return nums.length-count;
    }

    static class Reader {
        private BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
        private StringTokenizer tokenizer = new StringTokenizer("");

        private String innerNextLine() {
            try {
                return reader.readLine();
            } catch (IOException ex) {
                return null;
            }
        }

        public boolean hasNext() {
            while (!tokenizer.hasMoreTokens()) {    //内存中没有
                String nextLine = innerNextLine();
                if (nextLine == null) {     //且没有下一行
                    return false;
                }
                tokenizer = new StringTokenizer(nextLine);  //读入一行
            }
            return true;
        }

        public String nextLine() {
            tokenizer = new StringTokenizer("");    //清空内存中的字符
            return innerNextLine();
        }
        public void clear(){
            tokenizer = new StringTokenizer("");
        }

        public String next() {
            hasNext();
            return tokenizer.nextToken();
        }

        public int nextInt() {
            return Integer.parseInt(next());
        }

        public long nextLong() {
            return Long.parseLong(next());
        }

        public double nextDouble(){
            return Double.parseDouble(next());
        }
//    public BigInteger nextBigInt() {
//        return new BigInteger(next());
//    }
    }

}
